var bName = navigator.appName;
var bVer  = parseInt(navigator.appVersion);
var NS4   = ((bName == "Netscape") && (bVer >= 4));
var IE4   = ((bName == "Microsoft Internet Explorer") && (bVer >= 4));
var x, y, z;
var i = 0;


 
/* Alle anderen Untermenues ausblenden */

function ausblenden(){
	
	var thisspan;

 	for (i=1; i <= 7; i++) {
 		
 		if (NS4)  {
                    var loc_id = "menu" + i;
                    thisspan = document.getElementById(loc_id);
        	    
		}
		
		if (IE4) thisspan = eval("menu" + i);
 		
 		thisspan.style.visibility = "hidden";
 	}
}
 

/* Untermenue einblenden */
 
function menu_show(nr){
 
 	y = nr;
 	var iqthisspan;
 	
 	if (NS4)  {
		var aloc_id = "menu" + y;
		iqthisspan = document.getElementById(aloc_id);
	}
	
 	if (IE4) {
 		iqthisspan = eval("menu" + y);
 	}
 	
 	iqthisspan.style.visibility = "visible";
}

/* Untermenues ein- und/oder ausblenden */

function richtung(nr){

	x = nr;
	
	ausblenden();
	
	if (x != 0) menu_show(x);	
}